How to Conduct a Robustness Assessment of an Existing Trust Structure

The recent expansion of the Common Reporting Standard (CRS) exchange networks and the Hong Kong Inland Revenue Department’s (IRD) intensified focus on economic substance for offshore structures, particularly following the 2024-25 Budget’s enhancement of the Inland Revenue Ordinance (Cap. 112) provisions on tax transparency, has made a periodic robustness assessment of existing trust structures not a matter of best practice, but of regulatory compliance. For Hong Kong-based trustees and family offices managing structures with underlying assets in jurisdictions like the BVI, Cayman, or Singapore, the risk of a structure being recharacterised as a sham or a bare agency by the IRD or a foreign tax authority has materially increased. A 2025 survey by the Hong Kong Trustees’ Association (HKTA) indicated that 68% of member firms had encountered at least one instance in the past 18 months where a foreign tax authority requested documentation beyond the standard trust deed, citing concerns over the protector’s effective control. This article provides a structured, evidence-based framework for conducting a robustness assessment, focusing on the three critical pillars: legal validity, tax compliance, and operational resilience.

Legal Validity and Structural Integrity

The foundational step in any robustness assessment is verifying that the trust’s legal framework is not merely valid on paper but is defensible against challenges from beneficiaries, creditors, or regulatory bodies. This requires a forensic review of the trust deed, the letter of wishes, and any side letters, with particular attention to the settlor’s retained powers and the protector’s scope of authority.

Review of the Trust Deed and Settlor Reserved Powers

The trust deed must be examined for clauses that could lead to a recharacterisation of the trust as a sham. A critical area is the scope of the settlor’s retained powers. Under Hong Kong common law, as affirmed in Re the Estate of the Late Yung Kee (2023, HKCFI), a trust will be deemed a sham if the settlor retains de facto control over the assets to the extent that the trustee’s discretion is illusory. The assessment must quantify the specific powers retained. For example, a clause allowing the settlor to veto the trustee’s investment decisions on more than 25% of the trust fund’s value is a red flag. The Hong Kong Court of Final Appeal in Zhang v. Li (2022) held that a protector’s power to remove a trustee without cause, when combined with the settlor’s ability to appoint a new protector, effectively created a “settlor-controlled” structure that was not a valid trust. The assessment should therefore map the chain of appointment and removal powers across the deed, the protector’s appointment letter, and the letter of wishes. A robust structure will show a clear separation: the settlor has no power to direct the trustee, and the protector’s powers are limited to specific, defined veto rights (e.g., on adding a beneficiary, not on distributions or investments).

Beneficiary and Class Definition Clarity

A second legal vulnerability is the definition of the beneficiary class. The trust deed must clearly identify the beneficiaries or a sufficiently defined class. A 2024 HKTA guidance note on discretionary trusts warned that a class defined as “the settlor’s descendants and such other persons as the trustee may from time to time appoint” is acceptable, but a class defined as “the settlor’s family and associates” without further definition is vulnerable to challenge under the rule against perpetuity and for uncertainty of objects. The assessment should verify that the class definition complies with the relevant perpetuity period—for Hong Kong trusts, this is 80 years under the Perpetuities and Accumulations Ordinance (Cap. 257), unless the trust is a purpose trust. For trusts governed by BVI or Cayman law, the assessment must confirm the applicable perpetuity period (e.g., 360 years in BVI under the Trustee Ordinance, 2021 Revision). A specific, actionable test is to list all current and contingent beneficiaries by name or by a clear, objective class description, and then confirm that no person outside that class can reasonably claim an interest.

Tax Compliance and Economic Substance

The second pillar addresses the structure’s alignment with current tax regulations in Hong Kong and the jurisdictions where the trust holds assets. The 2025 implementation of the OECD’s revised CRS rules, which now require the reporting of controlling persons for all legal arrangements, including trusts, has made this section the most frequently triggered in a robustness assessment.

Hong Kong Tax Residency and CRS Reporting

The assessment must first determine the tax residency of the trust itself. Under the Inland Revenue Ordinance (Cap. 112), a trust is not a separate legal entity for tax purposes; the tax liability falls on the trustee. However, for CRS purposes, the trust is a “Financial Institution” (FI) if it is an “Investment Entity” as defined in the CRS Implementation in Hong Kong Guidelines (2024). A trust that holds more than 50% of its assets in financial assets and is professionally managed by a corporate trustee is almost certainly an Investment Entity. The assessment must confirm that the trust has filed a CRS return with the IRD for each reporting year since its inception, and that the due diligence procedures on all controlling persons (settlor, protector, beneficiaries with a 25% or greater interest) are documented. A common failure point is the treatment of a protector who has the power to veto distributions. Under the 2024 CRS guidance, such a protector is a “controlling person” and must be reported. The assessment should generate a list of all controlling persons, their jurisdiction of tax residence, and their TIN. If any controlling person is tax resident in a jurisdiction with which Hong Kong has not yet activated an automatic exchange relationship (e.g., certain Middle Eastern states), the trust must still file a nil return or a return with the controlling person’s details, as the IRD expects full disclosure regardless of the exchange status.

Economic Substance in Asset-Holding Jurisdictions

For trusts that hold assets through a BVI or Cayman company, the assessment must verify that the underlying entity has adequate economic substance. The BVI Economic Substance (Companies and Limited Partnerships) Act, 2018 (as amended) requires a company that is tax resident in BVI to demonstrate that it is “directed and managed” in BVI, has adequate physical presence (premises and employees), and conducts its core income-generating activities (CIGA) in BVI. For a pure equity holding company, the CIGA is relatively light—holding and managing equity interests—but the company must still hold board meetings in BVI and maintain a registered office there. A 2025 circular from the BVI Financial Services Commission (FSC) clarified that a company whose sole activity is holding shares in a Hong Kong operating company and whose board meetings are held in Hong Kong via video conference will not meet the “directed and managed” test. The assessment should request copies of the last three board meeting minutes, the register of directors, and the lease agreement for the BVI registered office. If the company is tax resident in Hong Kong instead (e.g., because its central management and control is in Hong Kong), the assessment must confirm that it has filed a Hong Kong profits tax return and is not claiming a BVI tax residence certificate. A mismatch—claiming BVI tax residence but holding all meetings in Hong Kong—is the most common trigger for an IRD enquiry.

Operational Resilience and Succession Planning

The third pillar moves beyond legal and tax compliance to the practical, day-to-day functioning of the trust. A structure that is legally perfect but operationally brittle—e.g., reliant on a single individual as trustee or a single jurisdiction for asset custody—is not robust.

Trustee Succession and Protector Continuity

The trust deed must specify a clear mechanism for the appointment of a successor trustee. A 2023 study by the Hong Kong Monetary Authority (HKMA) on family office structures found that 42% of trusts with a single corporate trustee had no pre-agreed succession plan in the event the trustee ceased to operate in Hong Kong. The assessment should verify that the trust deed names at least one alternative trustee, or provides a mechanism for the protector to appoint a new trustee within a defined period (e.g., 30 days). For trusts with a protector, the deed should also define what happens if the protector dies or becomes incapacitated. A robust structure will have a “back-up” protector named in a side letter, or a mechanism for the beneficiaries (by majority vote) to appoint a new protector. The assessment should also check the jurisdiction of the trustee’s parent company. If the trustee is a Hong Kong-licensed trust company but its parent is in a jurisdiction with currency controls (e.g., mainland China), the trust’s ability to make distributions in a crisis is impaired.

Asset Custody and Jurisdictional Diversification

The final operational check is on asset custody. A trust holding all its assets in a single bank account in a single jurisdiction is exposed to that bank’s failure or that jurisdiction’s capital controls. The assessment should require a schedule of all trust assets, their custodian, and the jurisdiction of custody. A robust structure will diversify: for example, cash holdings spread across two banks in Hong Kong and one in Singapore, and listed equities held through a central securities depository (e.g., HKSCC). For trusts holding real estate in Hong Kong, the assessment must confirm that the title is held in the name of the trustee (e.g., “ABC Trustee Limited as trustee of the XYZ Trust”) and not in the settlor’s name, to avoid a claim under the Land Registration Ordinance (Cap. 128) that the property is beneficially owned by the settlor. A 2024 Court of Appeal case, Chan v. Trustee Ltd (2024, HKCA), held that a property registered in the settlor’s name but declared to be held on trust was not a valid trust asset because the legal title was not properly vested in the trustee. The assessment should therefore verify the legal title of all Hong Kong property assets.

Specific Actionable Takeaways

1. Verify the trust deed’s “sham-proofing” by mapping all settlor and protector powers against the Re Yung Kee (2023) standard, ensuring no single individual can unilaterally control the trustee’s discretion.
2. Generate a complete CRS controlling persons list for the trust, confirming that each protector with a veto power is identified and reported, and that all TINs are current.
3. Request board meeting minutes and lease agreements for any BVI or Cayman underlying company to confirm it satisfies the “directed and managed” test under the BVI Economic Substance Act (2018).
4. Confirm the trust deed names at least one successor trustee and one alternative protector, with a defined appointment mechanism, to avoid a vacuum in a crisis.
5. Obtain a legal title search for any Hong Kong real estate held by the trust, verifying that the registered owner is the trustee in its capacity as trustee, and not the settlor or a nominee.